Cough Coughing is how you clear your lungs and airway, keeping germs and other toxins out of your respiratory tract. This video explains all that is involved when your body coughs, and why coughing is important. Pulmonary Awareness Series 6 years ago You may also like 1:50 What to Expect at Your Pulmonary Visit 6 years ago Pulmonary Awareness Series 2:46 Assisted Cough 6 years ago Pulmonary Awareness Series 2:56 Nighttime Breathing 6 years ago Pulmonary Awareness Series 3:00 C-PAP/BIPAP 6 years ago Pulmonary Awareness Series